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The application of design of experiments and CFD to the optimization of a fully parametric helical port design
Published November 01, 2000 by Institution of Mechanical Engineers in United Kingdom
The design of helical ports has traditionally been based upon the experience of a few gifted individuals. The natural consequence of this is that port design has become an evolutionary process. The application of CFD to port design enabled engine designers to gain a greater appreciation of the flow structure; however, port improvements still relied upon experience and good judgement. The aim of this study was to generate a process by which the performance of a helical port could be resolved via a mathematical model based on the port's geometric parameters. This model could then be used to derive the optimal shape of the port for a given performance criteria.
To achieve this aim a fully constrained helical port was constructed. Every geometric feature of this port was controlled via one or more parameters. The performance of any given design was assessed using Perkins' efficient steady flow CFD port process. In order to reduce the number of calculations required to generate the mathematical model and to provide a vehicle for optimization, the Design of Experiments methodology was adopted.
This paper will describe the relevance and accuracy of this approach as applied to a reduced parameter set selected from the complete parametric model.